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Confounding idiot light

Discussion in 'Quitters' Club' started by w3srl, Dec 14, 2012.

  1. Dec 14, 2012
    w3srl

    w3srl All-around swell dude Staff Member

    Port Orange, FL
    Joined:
    Nov 6, 2002
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    4,156
    I have a buddy with a early 2000's TJ that has an issue. I'll have more details this weekend,but it throws a check engine light and begins to miss anytime the tank goes below 1/4. Fill it back up and the light resets and the miss goes away. Been doing this for over a month now. I'll see him tomorrow and we're going to pull the codes then. Very strange problem. This really sounds like an emissions issue, like a plugged vent/return line or something.

    Idears?
     
    Last edited: Dec 14, 2012
  2. Dec 14, 2012
    hudsonhawk

    hudsonhawk Well-Known Member 2020 Sponsor

    North Texas...
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    Feb 4, 2005
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    1,863
    weak fuel pump maybee?
    Do you know what code was triggered?
     
  3. Dec 14, 2012
    Patrick

    Patrick Super Moderator Staff Member

    Los Alamos, NM
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    Sep 22, 2002
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    8,360
    You can retrieve the codes with the odometer.

    Sent from my C771 using Tapatalk 2
     
  4. Dec 14, 2012
    w3srl

    w3srl All-around swell dude Staff Member

    Port Orange, FL
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    Forgot about that Patrick, thanks! Unfortunately the vehicle is two counties away at the moment. We work together tomorrow afternoon, I won't be able to pull the codes until then. :(
     
  5. Dec 16, 2012
    GeoffreyL

    GeoffreyL Well-Known Member

    moorestown, nj
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    Aug 1, 2012
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    1,513
    sounds like a bad/weak fuel pump
     
  6. Dec 17, 2012
    w3srl

    w3srl All-around swell dude Staff Member

    Port Orange, FL
    Joined:
    Nov 6, 2002
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    4,156
    Code scan came up with an open circuit on the #1 injector and (big surprise) a misfire on #1 cylinder. (I wrote down the codes and gave them to the owner) Nothing to indicate why the open might be occurring, or why it is only on #1.

    I found a bunch of posts on the web about similar issues related to fuel level, but no definitive solutions other than keeping the tank filled above 1/4.

    He's really broke and has guy that is local to him to help him out since I'm over an hour away from him. This is really odd.
     
  7. Dec 18, 2012
    hudsonhawk

    hudsonhawk Well-Known Member 2020 Sponsor

    North Texas...
    Joined:
    Feb 4, 2005
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    Did you happen to look at the fuel tank skid plate. If its caved it it could be starving the pump.
     

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